Outgoing rhymes with:
churchgoing, moviegoing, oceangoing, ongoing, seagoing, churchgoing, elbowing, farrowing, glassblowing, moviegoing, oceangoing, ongoing, outgrowing, overflowing, overthrowing, seagoing, tiptoeing, torpedoing, winnowing
Outgoing sounds like:
outcomes, outgaining, outgains, outguessing, outgunning, outguns, outshines, outshining, outweighing